CVE-2026-59939 (GCVE-0-2026-59939)
Vulnerability from cvelistv5 – Published: 2026-07-08 19:34 – Updated: 2026-07-08 19:34
VLAI
EPSS
VEX
Title
httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling
Summary
httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small compressed payload that expands to an arbitrarily large size in memory and causes MemoryError or OOM-kill in the client process. This issue is fixed in version 0.32.0.
Severity
7.5 (High)
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/httplib2/httplib2/security/adv… | x_refsource_CONFIRM |
| https://github.com/httplib2/httplib2/commit/87581… | x_refsource_MISC |
| https://github.com/httplib2/httplib2/releases/tag… | x_refsource_MISC |
{
"containers": {
"cna": {
"affected": [
{
"product": "httplib2",
"vendor": "httplib2",
"versions": [
{
"status": "affected",
"version": "\u003c 0.32.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small compressed payload that expands to an arbitrarily large size in memory and causes MemoryError or OOM-kill in the client process. This issue is fixed in version 0.32.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-409",
"description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-08T19:34:05.150Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3"
},
{
"name": "https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427"
},
{
"name": "https://github.com/httplib2/httplib2/releases/tag/v0.32.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/httplib2/httplib2/releases/tag/v0.32.0"
}
],
"source": {
"advisory": "GHSA-j5g9-f88f-gfj3",
"discovery": "UNKNOWN"
},
"title": "httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-59939",
"datePublished": "2026-07-08T19:34:05.150Z",
"dateReserved": "2026-07-07T18:20:06.127Z",
"dateUpdated": "2026-07-08T19:34:05.150Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-59939",
"date": "2026-07-09",
"epss": "0.00339",
"percentile": "0.25903"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-59939\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-08T20:16:59.557\",\"lastModified\":\"2026-07-08T20:16:59.557\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small compressed payload that expands to an arbitrarily large size in memory and causes MemoryError or OOM-kill in the client process. This issue is fixed in version 0.32.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"httplib2\",\"product\":\"httplib2\",\"versions\":[{\"version\":\"\u003c 0.32.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-409\"}]}],\"references\":[{\"url\":\"https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/httplib2/httplib2/releases/tag/v0.32.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3\",\"source\":\"security-advisories@github.com\"}]}}"
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…